/Engine/Plugins/Protocols/MQTT/Source/MQTTCore/Public/MQTTClientObject.h
OutMessageId can be used to match this request with the callback response.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="MQTT", Meta=(DisplayName="Subscribe (Multiple Topics)")) [TArray](API\Runtime\Core\Containers\TArray)< [UMQTTSubscriptionObject](API\Plugins\MQTTCore\UMQTTSubscriptionObject) * > SubscribeMany ( const [TArray](API\Runtime\Core\Containers\TArray)< [FString](API\Runtime\Core\Containers\FString) > & InTopics, const [TArray](API\Runtime\Core\Containers\TArray)< [EMQTTQualityOfService](API\Plugins\MQTTCore\EMQTTQualityOfService) > InQoS )